Front row safety air bag and vehicle

Abstract

The utility model relates to a front-row safety air bag and a vehicle. The front-row safety air bag comprises an air bag, the air bag comprises a main panel and two side panels which are oppositely arranged in the wide edge direction of the main panel, the two long edges of the main panel are connected with the edge contours of the two side panels in a sewing mode respectively, the side panels are in an F shape, and the side panels are in an air inflation unfolding state. The air bag is in an F shape when observed from the side face and forms a main cavity and a supporting cavity which are in fluid communication, and the supporting cavity is located on the back face of the main cavity. The front-row safety air bag is suitable for the vehicle with a foldable steering wheel and particularly suitable for the scene where collision protection needs to be provided in the folding process of the steering wheel, the technical problem that a traditional safety air bag cannot adapt to the foldable steering wheel is solved, and the safety of the vehicle is improved. And a better passenger protection effect is provided. It is ensured that the front-row safety air bag can be correctly unfolded and effectively protected under the conditions that a steering wheel exists or not exists or in different steering wheel states.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of safety air bag, especially to a front-row safety air bag and vehicle. BACKGROUND

[0002] The safety air bag in the related art is mainly applicable to a traditional fixed steering wheel, and its deployment mode and support structure depend on the fixed position and deployment form of the fixed steering wheel. However, with the development of automobile intelligence, foldable steering wheels gradually become an important demand for future vehicles, especially in the automatic driving or semi-automatic driving mode, the foldable steering wheel can be automatically folded or stored in the instrument panel to provide more in-vehicle space for the driver or adapt to different driving scenes.

[0003] However, when the steering wheel is in the folded state, the distance and relative position between the steering wheel and the passenger change, and the inflation amount and support strength of the traditional safety air bag can not adapt to this change in the transition of the steering wheel from the unfolded state to the folded state, resulting in that the traditional safety air bag can not respond in time or can not provide sufficient buffer and support force for the passenger in the steering wheel folded state, increasing the risk of injury to the passenger in a frontal collision, thereby reducing the safety performance of the vehicle. SUMMARY

[0004] To overcome the problems in the related art, the present disclosure provides a front-row safety air bag and vehicle, especially a front-row safety air bag that provides collision protection for passengers in the folded state of a foldable steering wheel.

[0005] According to a first aspect of the embodiments of the present disclosure, the present disclosure provides a front-row safety air bag, comprising: an air bag comprising a main panel and two side panels oppositely arranged along the width direction of the main panel, two long edges of the main panel are respectively connected with the edge contours of the two side panels by sewing, wherein the side panels are in F shape, and in the inflated and unfolded state, the air bag is in F shape and forms a main cavity and a support cavity in fluid communication from the side, and the support cavity is located at the back of the main cavity.

[0006] In some embodiments, the air bag comprises an outer pull belt, the outer pull belt is located at the back of the main cavity, a first end of the outer pull belt is connected with the inflation end of the main cavity by strong sewing thread, and a second end of the outer pull belt is pre-sewn with the free end of the support cavity by weak sewing thread.

[0007] In some embodiments, the front-row airbag is a driver airbag for a foldable steering wheel, wherein in a steering wheel unfolded state, the second end of the outer pull belt pulls the free end of the support chamber, so that the support chamber is located above the steering wheel; in a steering wheel folded state, the weak suture of the second end of the outer pull belt is disconnected from the free end of the support chamber, and the support chamber is supported on the instrument panel of the vehicle.

[0008] In some embodiments, the front-row airbag comprises an inflation guide bag located in the airbag, and an air inlet of the inflation guide bag is connected to an air outlet of the gas generator by suture, wherein the inflation guide bag is provided with narrow and wide gas holes in the front-rear direction, the narrow gas holes are arranged towards the side of the windshield of the vehicle, and the wide gas holes are arranged towards the side of the occupant.

[0009] In some embodiments, the inflation guide bag is arranged with four side gas holes in the transverse direction, and the four side gas holes are symmetrically distributed along the midline of the front-rear direction of the inflation guide bag.

[0010] In some embodiments, the inflation guide bag is sewn from an isosceles trapezoidal-shaped cloth, the isosceles trapezoidal-shaped cloth is folded along the midline of the front-rear direction, and then two oblique sides of the isosceles trapezoidal-shaped cloth are connected by suture to form the inflation guide bag.

[0011] In some embodiments, the front surface of the main chamber of the airbag is inwardly folded to form an outer roll layer and an inner roll layer at the free end of the main chamber, and after the inner roll layer is rolled, the outer roll layer wraps the entire inner roll layer and is rolled into a mounting box located at the upper end of the steering wheel.

[0012] In some embodiments, the outer bending radius Ro of the free end of the support chamber is greater than 65 mm.

[0013] In some embodiments, on the back surface of the main chamber, the inflation end of the support chamber and the main chamber forms a first concave cavity, and the free end of the support chamber and the main chamber forms a second concave cavity, wherein the inner bending radius Ri of the first concave cavity and the second concave cavity is greater than 65 mm.

[0014] In some embodiments, the main panel is rectangular.

[0015] According to a second aspect of the embodiments of the present disclosure, the present disclosure provides a vehicle comprising the front-row airbag according to the first aspect, and the front-row airbag is mounted on the instrument panel of the vehicle.

[0016] The technical scheme provided by the embodiment of the present disclosure can have the following beneficial effects: the F-shaped side panel forms a support chamber on the back of the main chamber in the inflated and deployed state of the front-row airbag, and the support chamber provides additional support for the front-row airbag by abutting against the instrument panel, so that the front-row airbag can better adapt to the condition of no steering wheel at the co-driver position and the folding condition of the foldable steering wheel at the driver position, and the protection effect on the front-row passenger or driver is enhanced. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0018] Figure 1 is a cutting layout of a main panel and a side panel of a front-row airbag according to an exemplary embodiment;

[0019] Figure 2 is a perspective view of an inflated and deployed state of a front-row airbag according to an exemplary embodiment;

[0020] Figure 3 is another perspective view of an inflated and deployed state of a front-row airbag according to an exemplary embodiment;

[0021] Figure 4 is a relative position diagram of a support chamber and a steering wheel in a steering wheel deployed state;

[0022] Figure 5 is a relative position diagram of a support chamber and an instrument panel in a steering wheel folded state;

[0023] Figure 6 is an expanded diagram of an inflation guide bag according to an exemplary embodiment;

[0024] Figure 7 is a sewing diagram of an inflation guide bag according to an exemplary embodiment;

[0025] Figure 8 is a rolling process diagram of an airbag according to an exemplary embodiment. DETAILED DESCRIPTION

[0026] The exemplary embodiments will be described in detail herein with reference to the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present disclosure. Instead, they are merely examples of apparatuses and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0027] To solve the above technical problems, the present disclosure provides a front-row airbag 100 which can be applied to various vehicle configurations, including but not limited to the co-driver position and the main driver position equipped with a foldable steering wheel, and the front-row airbag 100 of the present disclosure is particularly suitable for protecting the driver in the steering wheel folding state. The following will be described in detail by taking the front-row airbag 100 applied to the main driver position with a foldable steering wheel as an example.

[0028] The front-row airbag 100 includes a gas bag having a storage and folding state and an inflation and unfolding state. In the present disclosure, when the gas bag is in the storage and folding state, the gas bag is completely folded and stored inside the instrument panel 400 of the vehicle. When applied to the main driver position, the gas bag is stored in the mounting box 401 above the steering wheel 200 of the instrument panel 400, thereby avoiding the steering wheel folding movement trajectory.

[0029] As shown in Figure 1 , the gas bag is connected by stitching the main panel 10 and the two side panels 20 arranged opposite along the width direction of the main panel 10. Specifically, the two long edges of the main panel 10 are respectively connected with the edge profiles of the two side panels 20 by stitching, and the two width edges of the main panel 10 are connected with each other by stitching, finally forming the complete gas bag structure in the inflation and unfolding state as shown in Figure 2 and Figure 3 .

[0030] As shown in Figure 1 , in the present embodiment, the main panel 10 is a rectangular structure. In other alternative embodiments, the shape of the main panel 10 can be adjusted to a trapezoidal shape, or other polygonal structures with irregular long edges, and the specific shape can be adjusted according to the actual application requirements, and the present disclosure does not make any restrictive provisions thereon.

[0031] The side panel 20 of the gas bag is in the shape of F, and when the side panel 20 is connected with the main panel 10 to form the gas bag, in the inflation and unfolding state, the gas bag also has the shape of F from the side view and forms a main chamber 30 and a support chamber 40 in fluid communication, the support chamber 40 is located at the back surface 32 of the main chamber 30, and is used to provide structural support.

[0032] When the vehicle collides, the front-row airbag 100 is ejected from the upper surface of the instrument panel 400 and inflates and unfolds towards the rear of the vehicle, and the front-row airbag 100 in the inflation state is in the shape of F, the front surface 311 of the main chamber 30 formed thereby is in contact with the windshield 300, and the rear surface 312 is used to abut against the face and chest of the occupant to absorb the impact of the occupant. As shown in Figure 4 , when the foldable steering wheel 200 of the main driver position is in the unfolded state, the support chamber 40 is supported on the instrument panel 400 above the steering wheel 200; as shown in Figure 5As shown, when the foldable steering wheel 200 at the primary driver position is in the folded state, the support chamber 40 is in abutment with the lower surface of the instrument panel 400, effectively compensating for the lack of support after the foldable steering wheel is folded, increasing the energy-absorbing space S from the lower surface of the instrument panel 400 to the front surface 31 of the main chamber 30 when the front-row airbag 100 is without the steering wheel 200.

[0033] Therefore, the front-row airbag 100 of the present disclosure is particularly suitable for vehicles equipped with foldable steering wheels, and can still provide complete protection in the folded state of the steering wheel. The technical problem that conventional airbags cannot adapt to foldable steering wheels is solved, ensuring that the airbag can correctly deploy and provide effective protection in different steering wheel states.

[0034] In some embodiments, the outer bending radius Ro of the free end 41 of the support chamber 40 is > 65 mm. This effectively avoids the problems of fabric adhesion and deployment obstruction caused by long-term folding and storage, ensuring that the support chamber 40 can be quickly and smoothly deployed. At the same time, the large radius of curvature increases the contact area of the free end 41 of the support chamber 40 with the instrument panel 400 in the deployed state, not only better maintaining the deployed form of the support chamber 40, but also significantly improving the energy absorption efficiency of the entire airbag, improving the cushioning performance, and effectively reducing the risk of airbag rupture, which is conducive to the dual requirements of compact storage and reliable deployment of the foldable steering wheel 200.

[0035] In some embodiments, on the back surface 32 of the main chamber 30, the inflation end of the support chamber 40 and the main chamber 30 forms a first concave cavity 21, and the free end 34 of the support chamber 40 and the main chamber 30 forms a second concave cavity 22, wherein the inner bending radius Ri of the first concave cavity 21 and the second concave cavity 22 is > 65 mm. In this embodiment, the second concave cavity 22 has two, located above and below the support chamber 40 respectively.

[0036] This makes the stress distribution of the airbag more uniform when it is inflated and deployed, effectively reducing the local stress concentration of the main panel 10 at the first concave cavity 21 and the second concave cavity 22, significantly reducing the risk of tearing of the main panel 10. At the same time, the large curvature of the inner bending radius Ri not only improves the overall structural strength of the airbag, but also improves the fatigue life of the airbag, ensuring the reliability and durability of the front-row airbag 100 in long-term use.

[0037] Further, as shown in FIG. 6, the front-row airbag 100 of the present disclosure is provided with a plurality of airbag chambers, and the airbag chambers are connected by a plurality of airbag chambers connecting lines 50. The airbag chambers connecting lines 50 are arranged in a plurality of rows, and the airbag chambers connecting lines 50 in each row are arranged in a plurality of columns. Figure 2 and Figure 3As shown, in some embodiments, the airbag can further include an outer pull strap 50, which is located at the back surface 32 of the main chamber 30, the first end 51 of the outer pull strap 50 is connected to the inflation end 37 of the back surface 32 of the main chamber 30 by strong stitching, and the second end 52 of the outer pull strap 50 is pre-stitched to the free end 41 of the support chamber 40 by weak stitching. Wherein, the strong stitching refers to a high-density stitching process, and the weak stitching refers to a low-density pre-stitching process.

[0038] The strong stitching is configured to maintain the connection strength in the inflated and unfolded state of the airbag, ensuring the stable connection of the first end 51 of the outer pull strap 50 to the main chamber 30; the weak stitching is configured to break under certain working conditions, including: when the steering wheel is in the folded state, the weak stitching breaks, causing the support chamber 40 to move downward to a pre-set position between the occupant and the instrument panel 400; when the steering wheel is in the unfolded state, the weak stitching remains connected, causing the support chamber 40 to be stably supported above the steering wheel.

[0039] In addition, by reasonably designing the length of the outer pull strap 50, when the steering wheel is in the unfolded state, the weak stitching at the second end 52 of the outer pull strap 50 and the free end of the support chamber 40 is kept connected, ensuring the positioning accuracy of the support chamber 40, and avoiding the support chamber 40 from falling to the front or lower side of the steering wheel 200. When there is no steering wheel or the steering wheel 200 is in the folded state, the weak stitching at the second end 52 of the outer pull strap 50 and the free end 41 of the support chamber 40 breaks, ensuring that the support chamber 40 falls between the occupant and the instrument panel 400 and is supported on the instrument panel 400, providing sufficient unfolding stroke to enable the support chamber 40 to accurately reach the pre-set increased energy absorption space.

[0040] Therefore, by specially stitching the two ends of the outer pull strap 50 and controlling the length of the outer pull strap 50, the specific unfolding position of the front-row airbag 100 can be controlled, and the support chamber 40 can be accurately positioned at the pre-set position.

[0041] In some embodiments, as shown in Figure 6 and Figure 7 The front-row airbag 100 includes an inflation guide bag 60, which is arranged inside the airbag, and the gas inlet 61 of the inflation guide bag 60 is connected to the gas outlet of the gas generator (not shown in the figure) by stitching and sealing. As shown in Figure 7 The inflation guide bag 60 is provided with narrow and wide gas holes 62 and 63 along the front and rear directions of the vehicle, the narrow gas holes 62 are arranged towards the windshield 300 side of the vehicle, and the wide gas holes 63 are arranged towards the occupant side. It can be seen that the gas outlet directions of the narrow and wide gas holes 62 and 63 of the inflation guide bag 60 are consistent with the unfolding direction of the airbag.

[0042] After the gas generator is started, the high-pressure gas is preferentially output through the wide dispersion gas hole 63, generating a thrust component F1 directed to the occupant side and a lift component F2 in the vertical deployment direction. The narrow dispersion gas hole 62 synchronously generates a positioning thrust F3 directed to the windshield 300 and a stabilizing torque that suppresses rotation of the airbag. By controlling the orifice size of the wide dispersion gas hole 63 and the narrow dispersion gas hole 62, the thrust ratio of F1 / F3 is controlled, enabling the airbag to complete directional deployment in place within a preset time and control the deployment trajectory deviation within a preset range, thereby providing timely and effective protection for the occupant in the event of a collision.

[0043] Further, as shown in Figure 6 The inflation guide bag 60 of the present disclosure is improved on the basis of the traditional three-way structure (including an air inlet, a left dispersion gas hole, and a right dispersion gas hole). Specifically, in addition to the air inlet 61, the narrow dispersion gas hole 62, and the wide dispersion gas hole 63 described above, the inflation guide bag 60 is also arranged with four side dispersion gas holes 64 in the transverse direction, which are symmetrically distributed along the midline of the inflation guide bag 60 in the front-rear direction.

[0044] By adding the four symmetrically distributed side dispersion gas holes 64, a multidirectional inflation channel is formed inside the airbag, and the symmetric layout of the side dispersion gas holes 64 ensures that the airflow can enter the airbag evenly, effectively eliminating the shaking phenomenon during the deployment of the airbag caused by asymmetric airflow in the traditional three-way structure. The resultant airflow of the multidirectional inflation channel makes the deployment of the inflation guide bag 60 also more stable and fast. In addition, stable airflow control ensures that the airbag can be quickly deployed according to the preset trajectory, improves the accuracy of the airbag deployment position, and enhances the fast and effective protection effect on the occupant.

[0045] In some embodiments, the inflation guide bag 60 is sewn using a single piece of isosceles trapezoidal cloth as the base material. After the isosceles trapezoidal cloth is folded along the midline M in the front-rear direction, the two sloping sides of the isosceles trapezoidal cloth are sewn together to form a three-dimensional inflation guide bag 60.

[0046] The folding forming method ensures the symmetry of the inflation guide bag 60, and the isosceles trapezoidal structure naturally forms the narrow dispersion gas hole 62 and the wide dispersion gas hole 63 after sewing, generating an airflow guide slope that keeps the gas diffusion direction consistent with the airbag inflation deployment direction. The inflation guide bag 60 of the present disclosure only needs to sew the two sloping sides of the isosceles trapezoidal cloth to complete the production, which is simple in structure, not only reduces the complexity of the production equipment, but also significantly improves the yield of the inflation guide bag 60, and is particularly suitable for large-scale automated production.

[0047] In some embodiments, as shown in Figure 8As shown, the front face 31 of the airbag main chamber 30 is inwardly folded to form an outer layer 35 and an inner layer 36 at the free end of the main chamber 30. After the inner layer 36 is wound, the outer layer 35 wraps the inner layer 36 and is entirely rolled into the mounting box 401 at the upper end of the steering wheel.

[0048] When the airbag is stored, the winding sequence of the outer layer 35 wrapping the inner layer 36 can prevent the airbag from being accidentally loosened in the folded state, ensuring the reliability of the packaging. And through the nesting of the outer layer 35 and the inner layer 36, the volume of the folded airbag is significantly reduced, improving the space utilization in the mounting box 401 at the upper end of the steering wheel.

[0049] When the airbag is deployed, the winding sequence of the outer layer 35 wrapping the inner layer 36 allows the airbag to be deployed according to the established deployment trajectory. The outer layer 35 is deployed first, and the inner layer 36 is deployed subsequently to provide cushioning support, achieving hierarchical and orderly deployment and avoiding the problem of entanglement during deployment that causes the airbag to fail to deploy.

[0050] Based on the same inventive concept, the disclosure provides a vehicle comprising the above-mentioned front-row airbag 100, which is installed on the dashboard 400 of the vehicle. The specific manner in which the above-mentioned embodiments function in the vehicle has been described in detail in the embodiments related to the front-row airbag 100, and will not be described in detail here.

[0051] Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice in the art to which the application pertains. It is intended that the specification and examples be considered exemplary only, with the true scope and spirit of the application being indicated by the following claims.

[0052] It should be understood that the present disclosure is not limited to the precise structures described above and illustrated in the drawings and that various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the claims that follow.

Claims

1. A front passenger airbag (100) characterized by, The airbag comprises a main panel (10) and two side panels (20) arranged opposite along the width direction of the main panel (10), the two long edges of the main panel (10) are respectively connected with the edge profiles of the two side panels (20) by sewing, wherein the side panel (20) is in F shape, and in the inflated and unfolded state, the airbag is in F shape from the side and forms a main cavity (30) and a support cavity (40) in fluid communication, the support cavity (40) is located at the back of the main cavity (30).

2. The front-row airbag (100) according to claim 1, wherein the airbag comprises an outer pull strap (50), the outer pull strap (50) is located at the back of the main cavity (30), the first end (51) of the outer pull strap (50) is connected with the inflation end (37) of the main cavity (30) by strong sewing thread, and the second end (52) of the outer pull strap (50) is pre-sewn with the free end of the support cavity (40) by weak sewing thread.

3. The front-row airbag (100) according to claim 2, wherein the front-row airbag (100) is a driver airbag for a foldable steering wheel, wherein in the steering wheel unfolded state, the second end (52) of the outer pull strap (50) pulls the free end (41) of the support cavity (40), so that the support cavity (40) is located above the steering wheel (200); in the steering wheel folded state, the weak sewing thread of the second end (52) of the outer pull strap (50) is disconnected with the free end (41) of the support cavity (40), and the support cavity (40) is supported on the instrument panel (400) of the vehicle.

4. The front-row airbag (100) according to claim 1, wherein the front-row airbag (100) comprises an inflation guide bag (60) located in the airbag, an air inlet (61) of the inflation guide bag (60) is connected with the air outlet of the gas generator by sewing, wherein the inflation guide bag (60) is provided with narrow and wide gas holes (62) and (63) in the front-rear direction, the narrow gas holes (62) are arranged towards the side of the windshield (300) of the vehicle, and the wide gas holes (63) are arranged towards the side of the occupant.

5. The front-row airbag (100) according to claim 4, wherein the inflation guide bag (60) is arranged with four side gas holes (64) in the left-right direction of the vehicle, and the four side gas holes (64) are symmetrically distributed along the middle line (M) of the inflation guide bag (60) in the front-rear direction.

6. The front-row airbag (100) according to claim 4, wherein the inflation guide bag (60) is sewn from an isosceles trapezoidal cloth, the isosceles trapezoidal cloth is folded along the middle line in the front-rear direction, and then the two oblique edges of the isosceles trapezoidal cloth are connected by sewing to form the inflation guide bag (60).

7. The front-row airbag (100) according to claim 3, wherein ​ The front surface (31) of the main chamber (30) of the airbag is inwardly folded to form an outer folded layer (35) and an inner folded layer (36) at the free end (34) of the main chamber (30), and the inner folded layer (36) is wrapped, and the outer folded layer (35) wraps the inner folded layer (36) and is entirely wrapped into the mounting box (401) at the upper end of the steering wheel (200).

8. The front-row airbag (100) according to claim 1, characterized in that, The outer bending radius Ro of the free end (41) of the support chamber (40) is greater than 65 mm.

9. The front-row airbag (100) according to claim 8, characterized in that, On the back surface (32) of the main chamber (30), the support chamber (40) and the inflation end (37) of the main chamber (30) form a first concave cavity (21), and the support chamber (40) and the free end (34) of the main chamber (30) form a second concave cavity (22), Wherein, the inner bending radius Ri of the first concave cavity (21) and the second concave cavity (22) is greater than 65 mm.

10. The front-row airbag (100) according to claim 1, characterized in that, The main panel (10) is rectangular.

11. A vehicle characterized by comprising: The front-row airbag (100) according to any one of claims 1 to 10 is mounted on the instrument panel (400) of a vehicle.

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